Gaya APA

Richardson, B., Fusco, M, A, C. (1993). The +10 Percent Principle How to get Extraordinary Results from Ordinary People . Singapore: Pfeiffer and Company.

Gaya MLA

Richardson, Barrie., Fusco, Mary, Ann, Castronovo. "The +10 Percent Principle How to get Extraordinary Results from Ordinary People". Singapore: Pfeiffer and Company, 1993. Text.